hinrichs



K. H. HINRICHS 1,783,472

OIL BASE INSULATING PAN FOR INTERNAL COMBUSTION ENGINES Dec. 2, 1930.

Filed Nov. 19, 1928 Patented ec. 2, 1930 KARL H. HINRICHS, F WINNETKA,ILLINOIS OIL-BASE VINS'U'LA'IING PAN INTERNAL-COMBUSTION :ENGINESApplication filed November 19, 1928. rSerial No. 320,385.

My invention relates to an oil base insulating pan for internalcombustion engines of the same general type as disclosed and broadlyclaimed in the copending application of Valter WV. iachwarting,` filedFebruary 17,

1928, under Serial Number 255,069.

The aims of my invention are to improve the method of attaching the panin respect to the engine oil base7 to facilitate the opening 10 of thepan to afford access to the oil base and the closing of said pan to forma tight joint between the pan and oil base and for causing a circulationof air through the pan when the temperature is such as to render theinsulat- 5 ing pan unnecessary for keeping the lubricant in the oil baseat the desired consistency.

To the above end, generally stated, the invention consi-sts of the noveldevices and combinations of devices hereinafter described and defined inthe claims.

'f In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout-the severalviews.

Referring to the drawings: Fig. 1 is a view principally in sideelevation of aninternal combustion engine having the invention appliedthereto and illustrated in central longitudinal section;

' Fig. 2 is a view principally in transverse vertical section taken onthe line 2-2 of Fig.

' 1, on an enlarged scale; y

Fig 3 is a fragmentary detail view with some parts sectioned on the line3-3 of Fig.

2, on an enlarged scale; and i Fig. 4 is a fragmentary view principallyin sectionA showing` amodification in which the door for the air intakepassageway is thermally controlled.

together with the insulation 13 forms a highly screw studs 16 and serve'as heads which enformed in the insulationl that extend from Theinternal combustion engine illustrated indicated as an entirety by thenumeral 5` detachably secured by screws, not shown, to the crank case 6.

Referring now in detail to the insulating pan 12, the same is lined onits sides and bottom with an insulating material 13. This pan 12surrounds the sides and bottom of the oil base 7 and the' same, togetherwith the insulating material 1d,` is spaced from said oil base to form adead air chamber 14 which,

efficient heat retainer.

` The insulating pan 12 at each side is held suspended from the crankcase 6 by a pair of upright hanger rods 15. These hanger rods `15 areheld suspended from the crank case 6 by screw studs 16 to which theupper ends of said rods are hinged at 17 for swinging movementtransversely of the engine he screw studs 16 are anchored to the crankcase 6 by removing certain ofthe screws heretofore referred to whichyattach the oilbase 8 to the crank case 7 and screwing said studs intothe tapped holes from which the screws have been removed. `Nuts 18 areapplied to the gage the flange 11 and hold the same pressed against thecrank case 6 to forma tight joint therewith.

The hanger rods 15 extend through holes so the top to the bottolnthereofand through aligned holes in the Vbottom of the pan 12. Nuts `19 areapplied to the screw-threaded lower ends of the hanger rods A15 andsupport the pan 12 therefrom. By tightening the nuts 19 on the hangerrods 15 the upper Inarginal edge portion of the pan 12 is pressedagainst the crank case 6 as well as the pliable insulationl to form atight joint between the pan 12 and the flange 11 of the oil base 7.

Formed inthe bottom of the pan 12 and the Vinsulation 13 is a largeaperture 2O into which the boss surrounding the drain hole 8 and thehead 10 ofthe plug 9 extend, see Fig. 3. Formed with the pan 12 andsurrounding the aperture v20 is a depending annularsleeve 21 to which isremovably applied a cap 22 having a capping flange 23 tclescoped ontothe sleeve 21 and detachably secured thereto by bayonet joints2a. Thecap 22 is provided with a piece of insulation 25 which substantiallycloses the sleeve 21. By removing the cap 22 access may be had to thescrew4 plug 9 to move the same and drain the old lubricant through thehole 8. In place of the bayonet joints 2112 the cap 22 may be detachablysecured to the sleeve 21 by screw threads or other suitable means.v

in place of taking the pan 12 olf in the summer time when it is notnecessary to insulate the oil base 7, an air intake opening and an airdischarge opening are formed one in each end of the pan 12 and providedeach with a door 26. This door 26fis hollow'and 15Vi'illed with aninsulating material 27. The doors 26 are hinged at their upper edges,.as indicated at 28, and arranged to be closed by gravity. Each door 26,although only one thereof is shown, is independently controlled Y by aLthermostat comprising a thermally actuated member 29 one end-of which.is anchored to a post 30 on a plate 31 on the inside of the pan 12 andthe other end thereof is 'attached to the short end of an .intermedithelever 32 is attached to the door 26 by a link 33. The thermostats areadapted to open Vthe door 26 when 'the temperature in the chamber 111-reaches a predetermined degree and control the closing thereofwvhen saidtemperature drops below said predetermined degree. Y l

When the doors 26 are open a forced draft will be produced through the.pan 12 under pan to permit the respective side of the pan i 12 to dropsufficiently to bring its upper edge substantially to the hinge joints17 so as to ,to swing open, as Y*shown by4 broken lines in Fig. 2. Thepan 12 may be s-wungopenon either side of theoil base 7 by removingth'eately fulcrumed lever 32. The long end of the movement ofthe vehicle onwhich theV be clear of the lstuds 16V and allow the pan 12 anddisplaceable closures for the passageways.

2. The structure defined in claim 1 in further combination withthermally actuated means for opening and closing the closures.

3. rlhe combination with an internal combustion engine having an oilbase, of aclosed pan surrounding the sides and bottom of the Yoil basebut spaced therefrom to afford a dead air chamber therebetween, '75vhinged doors for the passage/ways, and means for opening and closingYthe doors.

e. The combination with an internal combustion engine havingan oil base,of'a closed pan surrounding the sides and bottom `of the oil base butspaced therefrom to aord a dead air chamber therebetween, hinged doorsfor the passageways, and-automatic n means for opening and closing thedoors.v

5. The combination with an internal com-85 bustion engine having an oilbase, of a closed pan surrounding thesides and bottom of the oil basebut spaced therefrom to afford a dead air chamber therebetween, doorsfor the passageways arranged to close Linder theft-e0 action of gravity,and thermally actuated means for opening the doors and for controllingthe closing thereof.

Y 6. VThe combination with. an internal combustion engine having an oilbase, ofa closeda pan surrounding the sides and bottom of the Voil base,said panbeing hinged to the oil base for downward and outward swingingmovement from each side thereofy V7. The combination with an internalcom-95100 Vbustion engine having an'oil base, of a closed pansurrounding the sides andbottom of the oil base, andhinge-acting-members suspending the pan from the oil base at each sidethereof, said members being releasable fromf-S'ios either side of thepan to permit said pan to swing downwardly and' outwardly other side ofthe oil base. g Y 8. The combination with an internal combustion enginehaving an oil base, of a closedllo pan surrounding the sides and bottomof the oil base, upright hanger rods suspending the pan from theoilbase,and screw studs anchored to the oilbase Vand to which studs the yfromthe n upper endsl of said rods are hinged, said rodshavingV adjustablenuts'on their lower ends from which the pan is supported.

9. The combination with an internal combustionengine having an oil base,of aclosed` pan surrounding the sidesand, bottom of the 120 oil base',an insulating lining in the pan, up-v right hanger krods suspending thepan from the oil base, said 'rods `being removably mounted inpassageways in thevlining, and y screw studs' anchoredto the oilbase andto 125,

which studsthe 'upper -ends of the rods are Y hinged, said rods havingnuts ontheir lower f ends from whichthe pan is supported. l

10. The combination with an internal com- `bustion'engine having acranky case, an oil` 130 base and studs detaohably securing the oil baseto the crank case, of upright hanger rods having their upper ends hingedto the studs, adjustable nuts on the lower ends of the hanger rods, anda pan surrounding the sides and bottom of the oil base and supported onthe nuts of the hanger rods.

11. The combination with an internal combustion engine having an oilbase provided with a drain hol-e, and a screw plug normally closing thesame, of a pan surrounding the sides and bottom of the oil base andhaving an aperture into which the screw plug eX- tends, and adisplaoeable closure for the aperture, said pan being hinged to the oilbase for downward and outward swinging movement, said aperture beingarranged to permit the pan to swing clear of the screw stud during itsopening and closing movement's.

12. The combination with an internal combustion engine having a crankcase and an oil base and screw studs securing the oil base to the crankcase, of a pan surrounding the sides and bottom of the oil base, andupright hanger rods having their upper ends hinged to the screw rods andprovided with adjustable nuts from which the pan is supported and heldwith its upper edge pressed against 36 fthe oil base to form a tightjoint therewith.

In testimony whereof I aiX In signature.

KARL H. HIlRICHS.`

